<?php

$string = strtoupper($_GET['text']);

// create a 100*30 image
$im = imagecreate(80, 20);

// white background and blue text
$bg = imagecolorallocate($im, 216, 198, 166);
$textcolor = imagecolorallocate($im, 0, 0, 0);

// write the string at the top left
imagestring($im, 5, 0, 0, "$string", $textcolor);

// output the image
header("Content-type: image/png");
imagepng($im);

?> 